What is at?

The Individuals with Disabilities Education Act (IDEA) provides a legal definition of AT. The definition at 34C.F.R.§ 300.5 reads:

Assistive technology device means any item, piece of equipment, or product system, whether acquired commercially off the shelf, modified, or customized, that is used to increase, maintain, or improve the functional capabilities of a child with a disability. (Authority:20 U.S.C. 1401[1])

The term does not include a medical device that is surgically implanted, or the replacement of such device.